Remove claude-agent's Matrix presence entirely — Hermes is the only agent in Matrix

By request: one agent in Matrix, not several. Removes matrixBot.js,
router.js (chat-vs-code-task classifier), litellm.js (claude-agent's own
LiteLLM client), the matrix-bot-sdk dependency, runChatTask() and its
gitea.js branch/PR helpers (createBranch/createPullRequest — only ever
called from the now-removed chat flow), and every Matrix/LiteLLM env var
from claude-agent's compose service.

claude-agent already left the control room manually before this merge.
It keeps its Gitea-webhook-triggered PR review, which never touched Matrix
or LiteLLM to begin with.

Makes PR #12 (the claude-bot/Hermes cross-reply cascade fix) moot — the
bug can't happen once claude-agent has no Matrix client at all. Close #12
without merging once this lands.

.env.example

@@ -21,14 +21,21 @@ GITEA_REGISTRY_IMAGE=gitea.apps.williamturner.eu/<your-gitea-username>/<repo-nam
 # to generate this — it's a long-lived OAuth token, not an API key.
 CLAUDE_CODE_OAUTH_TOKEN=
 
-# --- matrix bot ---
-MATRIX_HOMESERVER_URL=https://matrix.apps.williamturner.eu
-MATRIX_BOT_TOKEN=
-MATRIX_CONTROL_ROOM_ID=
-
-# --- openrouter (the "!ai" chat command — other models, not the coding agent) ---
+# --- litellm (local LLM gateway — used by Hermes, see litellm-config.yaml) ---
 OPENROUTER_API_KEY=
-OPENROUTER_DEFAULT_MODEL=openai/gpt-4o-mini
+# Any random string; also used as litellm's general_settings.master_key.
+LITELLM_MASTER_KEY=
+
+# --- hermes (the only agent with a Matrix presence — see README) ---
+# Your own Matrix ID — Hermes only responds to this user, and only when @mentioned
+# in a room (free-response in DMs).
+MATRIX_HUMAN_USER_ID=@william:matrix.apps.williamturner.eu
+# Access token for the @hermes bot account — register it on the homeserver, then log
+# in as it via /_matrix/client/v3/login to get this token (see README).
+HERMES_MATRIX_ACCESS_TOKEN=
+# Any random string — bearer key for Hermes's own OpenAI-compatible API server
+# (internal network only, not published anywhere).
+HERMES_API_SERVER_KEY=
 
 # --- portainer (GitOps redeploy) ---
 PORTAINER_STACK_WEBHOOK_URL=

.gitea/workflows/build.yml

@@ -31,3 +31,10 @@ jobs:
           IMAGE="${{ vars.REGISTRY_HOST }}/${{ gitea.repository }}/claude-agent:latest"
           docker build -t "$IMAGE" ./agent
           docker push "$IMAGE"
+
+      - name: Trigger Portainer redeploy
+        # Deliberately NOT a separate Gitea repo webhook firing in parallel on the same
+        # push — that raced with this build and could redeploy before the new image was
+        # actually pushed, silently keeping the old code running. Chaining it here as the
+        # last step guarantees the image exists before Portainer goes to pull it.
+        run: curl -f -X POST "${{ secrets.PORTAINER_WEBHOOK_URL }}"

README.md

@@ -1,21 +1,25 @@
 # gitops-automation
 
-Claude Code automation wired into Gitea + Portainer + Matrix on this VPS. See
-`~/.claude/plans/cozy-honking-lantern.md` on the host for the full design rationale.
+Claude Code + Hermes automation wired into Gitea + Portainer + Matrix on this VPS. See
+`~/.claude/plans/cozy-honking-lantern.md` on the host for the original design rationale
+(some of it — the Matrix chat bot on claude-agent — has since been superseded, see below).
 
-Three things this gives you:
+What this gives you today:
 - **PR review**: opening/updating a PR in a watched Gitea repo gets a Claude-authored
-  review comment.
+  review comment (`claude-agent`, triggered by a Gitea webhook — nothing to do with Matrix).
 - **GitOps redeploy**: pushing to `main` on this repo rebuilds the `claude-agent` image
-  (Gitea Actions) and redeploys the stack (Portainer webhook).
-- **Chat-driven coding agent**: `!claude owner/repo <instruction>` in the Matrix control
-  room clones the repo, runs Claude Code, and opens a PR with the result.
-- **Ask other models**: `!ai <prompt>` (default model) or `!ai provider/model <prompt>`
-  (e.g. `!ai google/gemini-2.0-flash-001 explain this error`) queries any model on
-  OpenRouter and replies in the room. No repo/file access — just a chat reply, unlike
-  `!claude` which is the only command that can edit files and open PRs.
+  (Gitea Actions) and redeploys the stack, chained as the last step of that same workflow.
+- **Matrix**: **Hermes is the only agent present in Matrix.** `claude-agent` used to also
+  run a Matrix bot (`!claude`/`!ai` commands, then no-prefix auto-routing) — that's been
+  removed entirely (by request: one agent in Matrix, not several). Hermes has its own
+  native Matrix connection, responds to `@hermes <message>` in shared rooms (no mention
+  needed in DMs), and has its own tools (terminal, code execution, web search, etc.) — see
+  its docs at https://hermes-agent.nousresearch.com for what it can do. It does not (yet)
+  have the old branch/PR-opening workflow the Matrix bot used to have; that logic still
+  exists in git history if it's worth reviving as a Hermes tool/skill later.
 
-Nothing here auto-merges. Every path stops at a comment or an open PR — a human clicks merge.
+Nothing here auto-merges PRs. Every path stops at a comment or an open PR — a human clicks
+merge (enforced by branch protection on `main`, not just by convention — see below).
 
 ## Prerequisites (one-time, on the VPS)
 
@@ -125,17 +129,17 @@ docker network create web
 ## Smoke test
 
 - Open a throwaway PR on a repo with the PR webhook set → expect a Claude review comment.
-- In the Matrix control room: `!claude owner/repo add a comment to the README` → expect a
-  "working on it" reply, then a PR link.
-- `git push` to `main` on this repo → expect a Gitea Actions run, then a Portainer redeploy.
+- In the Matrix control room: `@hermes hello` → expect a reply from Hermes.
+- `git push` to `main` on this repo (touching `agent/**`) → expect a Gitea Actions run,
+  then a chained Portainer redeploy at the end of that same workflow.
 
 ## Notes
 
-- `agent/src/runner.js` is the only thing that ever runs `git commit`/`git push`/`git
-  checkout` — Claude Code itself is explicitly denied those tools (`--disallowedTools`),
-  so even a misbehaving prompt can't push directly or touch `main`.
-- The Matrix bot only reacts inside `MATRIX_CONTROL_ROOM_ID`; keep that room invite-only.
+- `agent/src/runner.js` only ever runs read-only `git clone`/`fetch`/`checkout` for the PR
+  diff it reviews — Claude Code itself is denied `Edit`/`Write`/commit/push tools
+  (`--disallowedTools`), so this path can never modify a repo, only comment on it.
 - `.gitea/workflows/build.yml` assumes the act_runner label `docker` — check
   `GITEA_RUNNER_LABELS` in `docker-compose.yml` matches what you actually registered.
-
-<!-- gitops loop smoke test 2026-08-23T11:23:34Z -->
+- Hermes's own config/memory/skills live in `/home/william/hermes-data` on the host
+  (bind-mounted, not in this repo) — back that up separately if it accumulates anything
+  worth keeping.

agent/package.json

@@ -8,7 +8,6 @@
     "start": "node src/server.js"
   },
   "dependencies": {
-    "express": "^4.19.2",
-    "matrix-bot-sdk": "^0.7.1"
+    "express": "^4.19.2"
   }
 }

agent/src/gitea.js

@@ -24,27 +24,6 @@ export async function postPRComment(owner, repo, index, body) {
   await assertOk(res, "post PR comment");
 }
 
-export async function createBranch(owner, repo, newBranch, oldBranch = "main") {
-  const url = `${GITEA_URL}/api/v1/repos/${owner}/${repo}/branches`;
-  const res = await fetch(url, {
-    method: "POST",
-    headers: authHeaders(),
-    body: JSON.stringify({ new_branch_name: newBranch, old_branch_name: oldBranch }),
-  });
-  await assertOk(res, "create branch");
-}
-
-export async function createPullRequest(owner, repo, { head, base = "main", title, body }) {
-  const url = `${GITEA_URL}/api/v1/repos/${owner}/${repo}/pulls`;
-  const res = await fetch(url, {
-    method: "POST",
-    headers: authHeaders(),
-    body: JSON.stringify({ head, base, title, body }),
-  });
-  await assertOk(res, "create PR");
-  return res.json();
-}
-
 // Injects the agent's token into a Gitea clone URL so git operations don't need SSH keys.
 export function authenticatedCloneUrl(cloneUrl) {
   const u = new URL(cloneUrl);

agent/src/matrixBot.js

@@ -1,101 +0,0 @@
-import { MatrixClient, SimpleFsStorageProvider } from "matrix-bot-sdk";
-import { runChatTask } from "./runner.js";
-import { askOpenRouter, DEFAULT_MODEL } from "./openrouter.js";
-
-const HOMESERVER_URL = process.env.MATRIX_HOMESERVER_URL;
-const ACCESS_TOKEN = process.env.MATRIX_BOT_TOKEN;
-const CONTROL_ROOM_ID = process.env.MATRIX_CONTROL_ROOM_ID;
-const GITEA_URL = process.env.GITEA_URL;
-
-const MAX_REPLY_LENGTH = 4000;
-
-// "!claude owner/repo do the thing" — everything after the repo slug is the instruction.
-function parseClaudeCommand(text) {
-  const match = text.match(/^!claude\s+([^\s/]+\/[^\s/]+)\s+(.+)$/s);
-  if (!match) return null;
-  const [, repoFullName, instruction] = match;
-  return { repoFullName, instruction: instruction.trim() };
-}
-
-// "!ai <prompt>" uses the default model. "!ai provider/model <prompt>" (first token
-// contains a "/") picks a specific OpenRouter model, e.g. "!ai google/gemini-2.0-flash-001
-// summarize this repo's README".
-function parseAiCommand(text) {
-  const match = text.match(/^!ai\s+(.+)$/s);
-  if (!match) return null;
-  const rest = match[1].trim();
-  const firstSpace = rest.search(/\s/);
-  const firstToken = firstSpace === -1 ? rest : rest.slice(0, firstSpace);
-  if (firstToken.includes("/") && firstSpace !== -1) {
-    return { model: firstToken, prompt: rest.slice(firstSpace + 1).trim() };
-  }
-  return { model: DEFAULT_MODEL, prompt: rest };
-}
-
-function truncate(text) {
-  if (text.length <= MAX_REPLY_LENGTH) return text;
-  return `${text.slice(0, MAX_REPLY_LENGTH)}\n\n[truncated]`;
-}
-
-export async function startMatrixBot() {
-  if (!HOMESERVER_URL || !ACCESS_TOKEN || !CONTROL_ROOM_ID) {
-    console.warn("Matrix env vars not set — skipping bot startup");
-    return;
-  }
-
-  const storage = new SimpleFsStorageProvider("/workspace/matrix-bot-storage.json");
-  const client = new MatrixClient(HOMESERVER_URL, ACCESS_TOKEN, storage);
-
-  // Not using AutojoinRoomsMixin: it calls /joined_rooms at startup to build its initial
-  // state, which — like the /whoami call removed earlier — 404s against Continuwuity for
-  // reasons unrelated to the endpoint itself (curling it directly works fine). This
-  // simpler handler does the one thing we actually need — auto-join on invite — without
-  // that startup scan.
-  client.on("room.invite", async (roomId) => {
-    try {
-      await client.joinRoom(roomId);
-    } catch (err) {
-      console.error("failed to join invited room", roomId, err.message);
-    }
-  });
-
-  client.on("room.message", async (roomId, event) => {
-    // Invite-only control room enforces who can reach the bot at all; this just scopes
-    // command handling to that one room. No need to fetch/compare the bot's own user ID
-    // to filter out its own messages — its replies never match either command pattern
-    // below, so they're ignored the same as any other non-command message.
-    if (roomId !== CONTROL_ROOM_ID) return;
-    const body = event.content?.body;
-    if (!body) return;
-
-    const aiCmd = parseAiCommand(body);
-    if (aiCmd) {
-      try {
-        const reply = await askOpenRouter(aiCmd.model, aiCmd.prompt);
-        await client.sendText(roomId, `[${aiCmd.model}] ${truncate(reply)}`);
-      } catch (err) {
-        console.error("openrouter query failed", err);
-        await client.sendText(roomId, `Failed: ${err.message}`);
-      }
-      return;
-    }
-
-    const cmd = parseClaudeCommand(body);
-    if (!cmd) return;
-
-    const [owner, repo] = cmd.repoFullName.split("/");
-    await client.sendText(roomId, `Working on it: ${cmd.repoFullName} — ${cmd.instruction}`);
-
-    try {
-      const cloneUrl = `${GITEA_URL}/${owner}/${repo}.git`;
-      const pr = await runChatTask({ owner, repo, cloneUrl, instruction: cmd.instruction });
-      await client.sendText(roomId, `Opened PR: ${pr.html_url}`);
-    } catch (err) {
-      console.error("chat task failed", err);
-      await client.sendText(roomId, `Failed: ${err.message}`);
-    }
-  });
-
-  await client.start();
-  console.log("Matrix bot started, room:", CONTROL_ROOM_ID);
-}

agent/src/openrouter.js

@@ -1,37 +0,0 @@
-const OPENROUTER_API_KEY = process.env.OPENROUTER_API_KEY;
-const DEFAULT_MODEL = process.env.OPENROUTER_DEFAULT_MODEL || "openai/gpt-4o-mini";
-
-export async function askOpenRouter(model, prompt) {
-  if (!OPENROUTER_API_KEY) {
-    throw new Error("OPENROUTER_API_KEY is not set");
-  }
-
-  const res = await fetch("https://openrouter.ai/api/v1/chat/completions", {
-    method: "POST",
-    headers: {
-      Authorization: `Bearer ${OPENROUTER_API_KEY}`,
-      "Content-Type": "application/json",
-    },
-    body: JSON.stringify({
-      model: model || DEFAULT_MODEL,
-      messages: [{ role: "user", content: prompt }],
-      // Some models default max_tokens to their full context window (e.g. 65536),
-      // which can exceed available credit balance before a single token is generated.
-      // This is a quick chat reply, not a long-form task — cap it.
-      max_tokens: 1024,
-    }),
-  });
-
-  if (!res.ok) {
-    throw new Error(`OpenRouter request failed: ${res.status} ${await res.text()}`);
-  }
-
-  const data = await res.json();
-  const content = data.choices?.[0]?.message?.content;
-  if (!content) {
-    throw new Error(`OpenRouter returned no content: ${JSON.stringify(data)}`);
-  }
-  return content;
-}
-
-export { DEFAULT_MODEL };

agent/src/runner.js

@@ -2,8 +2,7 @@ import { execFile } from "node:child_process";
 import { promisify } from "node:util";
 import { mkdtemp, rm, mkdir } from "node:fs/promises";
 import path from "node:path";
-import crypto from "node:crypto";
-import { authenticatedCloneUrl, createBranch, createPullRequest } from "./gitea.js";
+import { authenticatedCloneUrl } from "./gitea.js";
 
 const execFileAsync = promisify(execFile);
 const WORKSPACE_ROOT = "/workspace";
@@ -29,10 +28,12 @@ async function withWorkspace(fn) {
 // Runs Claude Code headless. Unattended containers have no TTY to answer permission
 // prompts, so this trusts the sandboxing of the throwaway clone dir instead:
 // bypassPermissions to avoid hanging, plus --disallowedTools as defense in depth so
-// Claude can never push/commit/checkout itself — this script owns those steps.
-async function runClaude(cwd, prompt, { allowEdits }) {
-  const disallowed = ["Bash(git push:*)", "Bash(git commit:*)", "Bash(git checkout:*)"];
-  if (!allowEdits) disallowed.push("Edit", "Write", "NotebookEdit");
+// Claude can never push/commit/checkout, or edit files — this is read-only review.
+async function runClaude(cwd, prompt) {
+  const disallowed = [
+    "Bash(git push:*)", "Bash(git commit:*)", "Bash(git checkout:*)",
+    "Edit", "Write", "NotebookEdit",
+  ];
 
   const args = [
     "-p", prompt,
@@ -59,41 +60,6 @@ export async function reviewPullRequest({ owner, repo, ref, cloneUrl, prTitle, p
       `PR description:\n${prBody}`,
     ].join("\n");
 
-    return runClaude(dir, prompt, { allowEdits: false });
-  });
-}
-
-export async function runChatTask({ owner, repo, cloneUrl, instruction }) {
-  return withWorkspace(async (dir) => {
-    const authedUrl = authenticatedCloneUrl(cloneUrl);
-    await run("git", ["clone", "--quiet", authedUrl, dir]);
-
-    const branch = `claude/${crypto.randomBytes(4).toString("hex")}`;
-    await createBranch(owner, repo, branch);
-    await run("git", ["fetch", "--quiet", "origin", branch], { cwd: dir });
-    await run("git", ["checkout", "--quiet", branch], { cwd: dir });
-
-    const prompt = [
-      "Implement the change described below in this repository. Make the smallest",
-      "correct change that satisfies it. Do not run git commit, git push, or git",
-      "checkout yourself — just edit files; committing and pushing happens separately.",
-      `Instruction: ${instruction}`,
-    ].join("\n");
-
-    await runClaude(dir, prompt, { allowEdits: true });
-
-    await run("git", ["add", "-A"], { cwd: dir });
-    const status = await run("git", ["status", "--porcelain"], { cwd: dir });
-    if (!status.trim()) {
-      throw new Error("Claude made no changes for this instruction");
-    }
-    await run("git", ["commit", "-m", `claude: ${instruction}`.slice(0, 200)], { cwd: dir });
-    await run("git", ["push", "--quiet", "origin", branch], { cwd: dir });
-
-    return createPullRequest(owner, repo, {
-      head: branch,
-      title: `claude: ${instruction}`.slice(0, 200),
-      body: `Requested via Matrix:\n\n> ${instruction}`,
-    });
+    return runClaude(dir, prompt);
   });
 }

agent/src/server.js

@@ -2,7 +2,6 @@ import express from "express";
 import crypto from "node:crypto";
 import { postPRComment } from "./gitea.js";
 import { reviewPullRequest } from "./runner.js";
-import { startMatrixBot } from "./matrixBot.js";
 
 const app = express();
 app.use(
@@ -60,7 +59,3 @@ app.post("/webhooks/gitea", async (req, res) => {
 app.listen(PORT, () => {
   console.log(`claude-agent listening on :${PORT}`);
 });
-
-startMatrixBot().catch((err) => {
-  console.error("matrix bot failed to start:", err);
-});

docker-compose.yml

@@ -36,7 +36,67 @@ services:
       - "traefik.http.routers.matrix.tls.certresolver=letsencrypt"
       - "traefik.http.services.matrix.loadbalancer.server.port=8008"
 
+  litellm:
+    # Pinned deliberately, not :latest or :main-latest — litellm==1.82.7/1.82.8 on PyPI
+    # were compromised with credential-stealing malware in March 2026 (fixed within the
+    # hour, but a floating tag could still land on a bad release in the future). v1.98.0
+    # verified clean as of this writing.
+    image: ghcr.io/berriai/litellm:v1.98.0
+    container_name: litellm
+    restart: unless-stopped
+    environment:
+      OPENROUTER_API_KEY: ${OPENROUTER_API_KEY}
+      LITELLM_MASTER_KEY: ${LITELLM_MASTER_KEY}
+    volumes:
+      # Absolute host path, NOT a repo-relative one — Portainer's git-stack deploy clones
+      # into its own directory (/data/compose/N/) whose checkout doesn't reliably persist
+      # for the container's runtime (see the act_runner config comment below for the same
+      # failure mode). An absolute path on the actual host filesystem always resolves the
+      # same way regardless of which tool ran `docker compose up`. Keep this local clone
+      # (/home/william/gitops-automation) pulled to latest when the config changes.
+      - /home/william/gitops-automation/litellm-config.yaml:/app/config.yaml:ro
+    command: ["--config", "/app/config.yaml", "--port", "4000"]
+    networks:
+      - web
+    # Internal only — no Traefik labels. No reason to expose an LLM gateway holding a
+    # master key and OAuth-forwarding config to the public internet.
+
+  hermes:
+    # Pinned to a specific dated release, not :latest — same rationale as litellm above.
+    image: nousresearch/hermes-agent:v2026.8.19
+    container_name: hermes
+    restart: unless-stopped
+    environment:
+      HERMES_UID: "1000"
+      HERMES_GID: "1000"
+      # Internal container address, not the public HTTPS one — same docker network as
+      # matrix-homeserver, no reason to round-trip through Traefik/TLS for this.
+      MATRIX_HOMESERVER: http://matrix-homeserver:8008
+      MATRIX_ACCESS_TOKEN: ${HERMES_MATRIX_ACCESS_TOKEN}
+      # Only you can trigger it; and only with an explicit @hermes mention in shared
+      # rooms (DMs to it would respond unprompted, per Hermes's own default behavior).
+      MATRIX_ALLOWED_USERS: ${MATRIX_HUMAN_USER_ID}
+      MATRIX_REQUIRE_MENTION: "true"
+      OPENROUTER_API_KEY: ${OPENROUTER_API_KEY}
+      # Left disabled: Hermes itself warns that a network-reachable API server combined
+      # with the default unsandboxed ('local') terminal backend gives any caller full
+      # terminal/file access within the container. Matrix is the actual interface in use;
+      # re-enable (API_SERVER_HOST: 0.0.0.0) only alongside terminal.backend: docker if
+      # claude-agent ever needs to call Hermes programmatically.
+      API_SERVER_ENABLED: "false"
+    volumes:
+      - /home/william/hermes-data:/opt/data
+    networks:
+      - web
+    # Without this the image's default command launches the interactive CLI, which
+    # immediately exits ("Input is not a terminal") since a detached container has no
+    # stdin — the container then just sits there having done nothing, every restart.
+    command: ["gateway", "run"]
+
   claude-agent:
+    # Gitea PR-review only now — no Matrix presence (see hermes above; only one agent
+    # is meant to be in Matrix). Still triggered by Gitea's pull_request webhook and
+    # posts review comments there, entirely independent of Matrix/LiteLLM.
     image: ${GITEA_REGISTRY_IMAGE}
     container_name: claude-agent
     restart: unless-stopped
@@ -50,11 +110,6 @@ services:
       # Claude subscription (Pro/Max) auth via `claude setup-token`, not API billing —
       # Claude Code reads this in preference to ANTHROPIC_API_KEY when both could apply.
       CLAUDE_CODE_OAUTH_TOKEN: ${CLAUDE_CODE_OAUTH_TOKEN}
-      MATRIX_HOMESERVER_URL: ${MATRIX_HOMESERVER_URL}
-      MATRIX_BOT_TOKEN: ${MATRIX_BOT_TOKEN}
-      MATRIX_CONTROL_ROOM_ID: ${MATRIX_CONTROL_ROOM_ID}
-      OPENROUTER_API_KEY: ${OPENROUTER_API_KEY}
-      OPENROUTER_DEFAULT_MODEL: ${OPENROUTER_DEFAULT_MODEL:-openai/gpt-4o-mini}
     volumes:
       - agent_workspace:/workspace
     networks:

litellm-config.yaml

@@ -0,0 +1,29 @@
+model_list:
+  # General chat — OpenRouter's own auto-router picks the best underlying model per prompt.
+  - model_name: auto
+    litellm_params:
+      model: openrouter/openrouter/auto
+      api_key: os.environ/OPENROUTER_API_KEY
+
+  # Cheap/fast model used by the agent's own chat-vs-code-task classifier, not by users directly.
+  - model_name: router-classifier
+    litellm_params:
+      model: openrouter/openai/gpt-4o-mini
+      api_key: os.environ/OPENROUTER_API_KEY
+
+  # Routes to Anthropic using the CALLER's forwarded Authorization header (the Claude
+  # Pro/Max subscription OAuth token) instead of a LiteLLM-held API key — billed against
+  # the subscription, not per-token. CONFIRMED WORKING, but only for the real `claude`
+  # CLI binary as caller (tested: `claude -p` with ANTHROPIC_BASE_URL pointed here
+  # returned a real completion). An earlier test with plain curl replicating the same
+  # request shape failed — Anthropic apparently requires header/fingerprint details only
+  # the real CLI sends, which LiteLLM faithfully relays but a hand-built request won't
+  # have. Do NOT expect this to work for other callers (Hermes, generic HTTP clients) —
+  # they aren't the real CLI and can't reproduce that fingerprint.
+  - model_name: anthropic-claude
+    litellm_params:
+      model: anthropic/claude-sonnet-5
+
+general_settings:
+  forward_client_headers_to_llm_api: true
+  master_key: os.environ/LITELLM_MASTER_KEY